If this is your first visit, be sure to
check out the FAQ by clicking the
link above. You may have to register
before you can post: click the register link above to proceed. To start viewing messages,
select the forum that you want to visit from the selection below.

Videa tearing when played on KDE with desktop effects enabled!

Hi,

First: I'm not quite sure if this belongs here or in the Desktop section.. I think it depends on where the cause of this problem lies (which I don't know)

So, i'm trying to play video in linux.. It woks just fine if i disable the KDE desktop effects, but as soon as i enable desktop effects i have video tearing.. like vsync is disabled. I use KDE 4.4.2 (latest version). I've tried every single setting KDE has to offer in effect terms (specially enable direct rendering and use vsync) but they don't seem to impact playback at all.

I also ran those commands:
sudo aticonfig --initial // to get a xorg.conf file from scratch generated by aticonfig. I on purposely removed my old xorg.conf
sudo aticonfig --sync-video=on
sudo aticonfig --sync-vsync=on

That resulted in the following xorg.conf (i didn't add a single thing manually!)

VSync is not supported by Catalyst with desktop effects enabled. I thought it's a well known fact.

wans't a known fact for me...

some new findings:
- There is also video taering with desktop effects disabled although barely noticeable.. I just notice it when watching video for more then a few minutes
- The oss radeon driver does not have this tearing on my 5770 card but has the side effect that fullscreen is... just not something you would want to do on the radeon driver that currently has everything in software rendering...

In the early days of the radeonhd driver (before acceleration) people were having pretty good luck playing video with mplayer using the x11 output (with CPU doing software scaling). It depends on your CPU and screen size, of course...